Sorghum grain yield, forage biomass production and revenue as affected by intercropping time

Sorghum is an excellent alternative to other grains in poor soil where corn does not develop very well, as well as in regions with warm and dry winters. Intercropping sorghum [Sorghum bicolor (L.) Moench] with forage crops, such as palisade grass [Brachiaria brizantha (Hochst. ex A. Rich) Stapf] or guinea grass (Panicum maximum Jacq.), provides large amounts of biomass for use as straw in no-tillage systems or as pasture. However, it is important to determine the appropriate time at which these forage crops have to be sown into sorghum systems to avoid reductions in both sorghum and forage production and to maximize the revenue of the cropping system. This study, conducted for three growing seasons at Botucatu in the State of São Paulo in Brazil, evaluated how nutrient concentration, yield components, sorghum grain yield, revenue, and forage crop dry matter production were affected by the timing of forage intercropping. The experimental design was a randomized complete block design. Intercropping systems were not found to cause reductions in the nutrient concentration in sorghum plants. The number of panicles per unit area of sorghum alone (133,600), intercropped sorghum and palisade grass (133,300) and intercropped sorghum and guinea grass (134,300) corresponded to sorghum grain yields of 5439, 5436 and 5566kgha-1, respectively. However, the number of panicles per unit area of intercropped sorghum and palisade grass (144,700) and intercropped sorghum and guinea grass (145,000) with topdressing of fertilizers for the sorghum resulted in the highest sorghum grain yields (6238 and 6127kgha-1 for intercropping with palisade grass and guinea grass, respectively). Forage production (8112, 10,972 and 13,193Mg ha-1 for the first, second and third cuts, respectively) was highest when sorghum and guinea grass were intercropped. The timing of intercropping is an important factor in sorghum grain yield and forage production. Palisade grass or guinea grass must be intercropped with sorghum with topdressing fertilization to achieve the highest sorghum grain yield, but this significantly reduces the forage production. Intercropping sorghum with guinea grass sown simultaneously yielded the highest revenue per ha (€ 1074.4), which was 2.4 times greater than the revenue achieved by sowing sorghum only. © 2013 Elsevier B.V.

Resistência de genótipos de feijoeiro ao ataque de Bemisia tabaci (Genn.) Biótipo B (Hemiptera: Aleyrodidae) e Caliothrips phaseoli (Hood.) (Thysanoptera: Thripidae)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Las bolsas de cereales y su influencia en las exportaciones de América Latina y el Caribe = The grain exchanges and their influence on Latin American and Caribbean exports

Incluye Bibliografía

Efeito da sazonalidade no teor proteico e composição de aminoácidos no pólen apícola produzido em Botucatu, Estado de São Paulo

Pós-graduação em Zootecnia - FMVZ

Efeito do silício aplicado no solo e em pulverização foliar na incidência da lagarta do cartucho na cultura do milho

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Influência de sistemas de semeadura na população de pragas e nas características morfofisiológicas em cultivares de soja

Pós-graduação em Agronomia (Proteção de Plantas) - FCA

Comparação da ocorrência de insetos na cultura do feijoeiro (Phaseolus vulgaris L.) cultivado nos sistemas orgânico e convencional

Pós-graduação em Agronomia (Proteção de Plantas) - FCA

Efeitos de tácticas alternativas de controle do tripes do prateamento em cultura de amendoim e seus reflexos na produtividade

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Qualidade do café natural e despolpado em diferentes condições de secagem e tempos de armazenamento

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Sistema de monitoramento de temperatura e umidade em silos graneleiros via rádio

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Otimização da produção massal e formulação de Bipolaris euphorbiae visando à obtenção de um bioherbicida

Pós-graduação em Microbiologia Agropecuária - FCAV

Activity of some isoenzymatic systems in stored coffee grains

Considering the worldwide consumption of coffee, it is natural that throughout the history many people have dedicated the research to markers that contribute somehow on gauging its quality. This research aimed to evaluate the biochemical performance of arabica coffee during storage. Coffee in beans (natural) and in parchment (pulped) dried in concrete terrace and in dryer with heated air were packed in jute bags and stored in not controlled environmental conditions. Enzymatic activities of superoxide dismutase, catalase, peroxidase, polyphenoloxidase, esterase and lipoxygenase in coffee grains were evaluated at zero, three, six, nine and twelve months by means of electrophoresis. Independently of the drying method, the activity of isoenzymatic complexes highlighted deteriorative processes in stored grains of coffee. The treatments 60/40º C and 60º C used to reduce the water content imposed a greater stress condition, accelerated metabolism of natural coffee in the storage with decreased activity of defense mechanisms due to latent damage in these grains. Natural coffees are more sensible to high drying temperatures and its quality reduces faster than pulped coffee in the storage.

Qualidade do café em coco e em pergaminho armazenados em atmosfera modificada

Pós-graduação em Agronomia (Energia na Agricultura) - FCA

Effects of different formulations of neem oil-based products on control Zabrotes subfasciatus (Boheman, 1833) (Coleoptera: Bruchidae) on beans

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

A Spatial and Temporal Prediction Model of Corn Grain Yield as a Function of Soil Attributes

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)